1997 Oldsmobile Aurora Owner's Manual - Page 123

SDeedometer Odometer and Trip Odometer Your odometer shows how far your vehicle has been driven in either miles (used in the United States) or kilometers (used in Canada). Your trip odometer tells you how far you have driven since you last reset it. Press the trip button located next to the trip odometer below the fuel gage. Your Aurora has a tamper resistant odometer. If you see silver lines between the numbers, you'll know someone has probably tampered with it and the numbers may not be true. You may wonder what happens if your vehicle needs a new odometer installed. If the new one can be set to the mileage total of the old odometer, then itmust be. But if it can't, then it's set at zero and a labelmust be put on the driver's door to show the old mileage reading when the new odometer was installed. Your speedometer lets you see your speed in both miles per hour (mph) and kilometers per hour (km/h). 2-67